code: def forward(self, embeddings, labels):
      return self.loss_fn(labels, embeddings, self.margin, self.p)
  
file_path: vision/references/similarity/loss.py
imports: import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the TripletMarginLoss obj's underlying member method code with example usage: obj.forward(embeddings, labels) and returns: self